Improvement in burglar-alarms



Patented Oct. 31,1871.

Invent f ABBOTT Q. ROSS.

Improvement in Burglar Alarmsm FHOTD-UTHM/MP/f/C :0 x1, x mxsomvn's-PEDLIJI/ UNITED STATES PATENT OFFICE.

ABBOTT Q. ROSS, OF cINcINNATI, oHIo, ASSIGNOR To ALFRED H. BROOKS, on

PHILADELPHIA, PENNSYLVANIA. I

IMPROVEMENT IN BURGLAR-ALARMS.

Specification forming part of Letters Patent No. 120,399, dated October31, 1871.

To all whom it may concern:

Be it known that I, ABBOTT Q. Ross, of Oincinnati, Hamilton county,State of Ohio, have invented certain new and useful Improvements inBurglar-Alarms, of which the following is a specification My inventionrelates to improvements upon the apparatus for which Letters Patent No.25,586 were granted to me September 27, 1859; and consists: First, in apeculiar device for lighting the match and simultaneously turning. onthe gas. Second, in a peculiar device for releasing the gas-lightingmechanism upon the opening of a door or window or other operationcausing the slacking of the alarm-wires. Third, in the provision ofsliding indicator-plates for recording when a door or window has beenopened and closed again.

Figure 1 is a perspective view, partly in section, of my improvedmachine. Fig. 2 represents detached portions of the same in perspective.

A is the alarm'bell; B, the spring-clapper for ringing it O, the spindleto which the clapper is journaled D, the pitman for giving (throughcrank E and gearing F G) the required motion to the clapper; H, theweight for operating the alarm mechanism; and I J K, the drum, ratchet,and pawl for winding up and running off the weight. The weight is heldin the suspended position, when wound up, either by trigger-pawl L, whenthe machine is not required to operate, or by the finger M, when theapparatus is set for operation. N is the gas-pipe, and O the faucet ofthe same. The key of the faucet is operated to close the latter bysecuring the lever P to the cross-head Q by means of the hook-endedchain P, shown in Fig.1, and is operated to open it by means of a coiledspring secured to the arm 19 of the lever P. The cross-head Q issecurely held (until released by the alarm mechanism) by means of thestop It, Fig. 2. The match for lighting the gas is placed in the socketSand forced through the split end T, the forcible contact of the matchwith the sides of the opening sufficing to ignite it and light the gas.The match is forced out by the rod U, operated by spring V, the springresting at one end against the end of socket S, and at the opposite endagainst a projecting collar on the rod U. The side rods W, which aresecured to rod U, carry a cross-head, Q, which slides upon the socket S.

The cross-head serves, in the manner shown in Fig. 1, to hold thegas-faucet closed and the match in the socket until both are set free bythe entrance of the burglar or disturbance of the windows or doors. Thealarm mechanism, including the lighting of the match and gas, is setfree by the slacking of stretched wires or wire,

- as in my former patent, the wires, when stretched,

vated by the action of one or more of the arms X, the latter beingoperated by one or more of the springs Y.

The elevation of the frame Z releases the finger M, permits the weight Hto ring the alarm-bell, and pushes off the cross-head through hinged pina. When'the cross-head is pushed off the spring on the arm 19 opens thegas-faucet and the springV forces out the match, the chain beingreleased from the cross-head in the operation. If, however, the lever Pbe made short and the chain long the chain may remain attached to thecross-head. The match may be operated to light a lamp in place of agas-jet when necessary. The elevation of one or more of theindicator-platesc, upon which is stamped the name or number of doors orwindows, indicates the particular door or window, or doors or windows,having been opened.

In order to register the door or window opened and closed by the burglarI attach the slides 01 to the back of the instrument. These slides arefitted to the grooved plates e in such a way that when the indicatorsare elevated they carry the slides with them, and when they descendagain by reason of the stretching of the wire or wires again the slidesare left in the elevated position, and thus indicate the door or windowwhich has been opened and again closed.

I claim herein as new and of my invention- 1. In combination with thehinged frame Z M and alarmbell mechanism, the finger or pin a,match-socket S T, and spring piston-rod and cross-head V U Q, the partsbeing connected and operating substantially in the manner and foroperating substantially as described and for purthe purpose set forth.posespecified.

2. In combination with the elements of the In testimony of whichinventionIhereunto set preceding clause, the spring-lever and chain P myhand.

1? p, governing the gas-jet, in the manner and ABBOTT Q. ROSS. for thepurpose set forth. WVitnesses:

3. In combination with the stretched Wires 1) L. T. IGLEHEART and hingedframe Z, the slides 01, connected and HENRY REIs. (24)

